What the combine taught us about the top 5 QB prospects

The top quarterback prospects wrapped up their NFL Scouting Combines on Saturday. Signal-callers are put under a more powerful microscope than any other position during their time in Indianapolis.

When the dust settled, none of the consensus top five quarterbacks separated themselves from the competition, leaving the door wide open in a battle to be drafted first overall on April 26.

Here's how the top prospects fared at Lucas Oil Stadium:

Josh Allen

As polarizing a prospect as they come, Allen had an up-and-down Saturday. Despite his 6-foot-5, 237-pound frame, Allen is a high-level athlete. His 40-yard dash time (4.75 seconds) ranked third among quarterbacks, while his 33.5-inch vertical leap and 9-foot-11 broad jump were tops at the position.

Allen drew plenty of acclaim for his arm strength as well. The Wyoming product had a number of throws that traveled 70-80 yards.

Watch: Josh Allen has no problem with the deep ball

While his rocket arm was on full display, Allen predictably struggled with accuracy and anticipation. For every impressive throw, there was one that sailed past his receiver.

Josh Rosen

Similar to Allen, Rosen has his share of fans inside NFL circles. While lacking in the athletics department compared to his counterparts, Rosen displayed strong footwork and made a number of good throws. However, much like his tape illustrates, he threw one or two questionable balls. Here's one of his best:

Character scrutiny is at the forefront of Rosen's scouting report, so his combine press conference was as intriguing as his on-field performance. The former UCLA quarterback did his best to quiet those concerns, displaying confidence and maturity.

Baker Mayfield

Mayfield was predictably solid in passing drills, but didn't rate as an elite athlete in other events. Similar to Rosen, much attention was paid to his Friday press conference.

Never one to shy away from voicing his opinions, the former Oklahoma Sooner toes the line between confident and cocky. He offered himself as the best option to turn the Cleveland Browns around. Opinions regarding Mayfield could differ greatly depending on the team.

Lamar Jackson

Jackson spent most of his weekend deflecting rumors of teams asking him to work out as a wide receiver. In quarterback drills Saturday, the ex-Louisville signal-caller completed a number of deep passes, but displayed timing issues on others.

Related: Lamar Jackson right to dismiss any team that asks him to work out as WR

Perhaps the most disappointing aspect of Jackson's combine was the former Heisman Trophy winner backing out of the 40-yard dash in response to the receiver workout requests.

Sam Darnold

Darnold decided not to throw at the combine, participating only in athletic testing. The decision left a sour taste in some evaluators' mouths, but the former USC quarterback believed it was ultimately the best decision for him. NFL scouts will have to schedule private workouts or wait until his March 21 pro day to watch him throw.

During his press conference Friday, Darnold stated he won't attempt to change his throwing motion. Some will see a quarterback confident in his abilities. Others may not.